includes/utils/MWFileProps.php

   1 <?php
   2 /**
   3  * MimeMagic helper functions for detecting and dealing with MIME types.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * MimeMagic helper wrapper
  25  *
  26  * @since 1.28
  27  */
  28 class MWFileProps {
  29         /** @var MimeMagic */
  30         private $magic;
  31
  32         /**
  33          * @param MimeMagic $magic
  34          */
  35         public function __construct( MimeMagic $magic ) {
  36                 $this->magic = $magic;
  37         }
  38
  39         /**
  40          * Get an associative array containing information about
  41          * a file with the given storage path.
  42          *
  43          * Resulting array fields include:
  44          *   - fileExists
  45          *   - size (filesize in bytes)
  46          *   - mime (as major/minor)
  47          *   - media_type (value to be used with the MEDIATYPE_xxx constants)
  48          *   - metadata (handler specific)
  49          *   - sha1 (in base 36)
  50          *   - width
  51          *   - height
  52          *   - bits (bitrate)
  53          *   - file-mime
  54          *   - major_mime
  55          *   - minor_mime
  56          *
  57          * @param string $path Filesystem path to a file
  58          * @param string|bool $ext The file extension, or true to extract it from the filename.
  59          *             Set it to false to ignore the extension.
  60          * @return array
  61          * @since 1.28
  62          */
  63         public function getPropsFromPath( $path, $ext ) {
  64                 $fsFile = new FSFile( $path );
  65
  66                 $info = $this->newPlaceholderProps();
  67                 $info['fileExists'] = $fsFile->exists();
  68                 if ( $info['fileExists'] ) {
  69                         $info['size'] = $fsFile->getSize(); // bytes
  70                         $info['sha1'] = $fsFile->getSha1Base36();
  71
  72                         # MIME type according to file contents
  73                         $info['file-mime'] = $this->magic->guessMimeType( $path, false );
  74                         # Logical MIME type
  75                         $ext = ( $ext === true ) ? FileBackend::extensionFromPath( $path ) : $ext;
  76                         $info['mime'] = $this->magic->improveTypeFromExtension( $info['file-mime'], $ext );
  77
  78                         list( $info['major_mime'], $info['minor_mime'] ) = File::splitMime( $info['mime'] );
  79                         $info['media_type'] = $this->magic->getMediaType( $path, $info['mime'] );
  80
  81                         # Height, width and metadata
  82                         $handler = MediaHandler::getHandler( $info['mime'] );
  83                         if ( $handler ) {
  84                                 $info['metadata'] = $handler->getMetadata( $fsFile, $path );
  85                                 /** @noinspection PhpMethodParametersCountMismatchInspection */
  86                                 $gis = $handler->getImageSize( $fsFile, $path, $info['metadata'] );
  87                                 if ( is_array( $gis ) ) {
  88                                         $info = $this->extractImageSizeInfo( $gis ) + $info;
  89                                 }
  90                         }
  91                 }
  92
  93                 return $info;
  94         }
  95
  96         /**
  97          * Exract image size information
  98          *
  99          * @param array $gis
 100          * @return array
 101          */
 102         private function extractImageSizeInfo( array $gis ) {
 103                 $info = [];
 104                 # NOTE: $gis[2] contains a code for the image type. This is no longer used.
 105                 $info['width'] = $gis[0];
 106                 $info['height'] = $gis[1];
 107                 if ( isset( $gis['bits'] ) ) {
 108                         $info['bits'] = $gis['bits'];
 109                 } else {
 110                         $info['bits'] = 0;
 111                 }
 112
 113                 return $info;
 114         }
 115
 116         /**
 117          * Empty place holder props for non-existing files
 118          *
 119          * Resulting array fields include:
 120          *   - fileExists
 121          *   - size (filesize in bytes)
 122          *   - mime (as major/minor)
 123          *   - media_type (value to be used with the MEDIATYPE_xxx constants)
 124          *   - metadata (handler specific)
 125          *   - sha1 (in base 36)
 126          *   - width
 127          *   - height
 128          *   - bits (bitrate)
 129          *   - file-mime
 130          *   - major_mime
 131          *   - minor_mime
 132          *
 133          * @return array
 134          * @since 1.28
 135          */
 136         public function newPlaceholderProps() {
 137                 return FSFile::placeholderProps() + [
 138                         'metadata' => '',
 139                         'width' => 0,
 140                         'height' => 0,
 141                         'bits' => 0,
 142                         'media_type' => MEDIATYPE_UNKNOWN
 143                 ];
 144         }
 145 }